论文标题
触发标量，矢量和张量形式从接触相互作用
Pion scalar, vector and tensor form factors from a contact interaction
论文作者
论文摘要
在dyson-schwinger和Bethe-Salpeter方程方法中涵盖的量子标量标量，矢量和张量形式因素是在量子染色体动力学（QCD）的对称性接触相互作用模型（CI）中计算的。除了传统的彩虹束截断之外，还采用了用于贝特盐的方程式的改进的相互作用内核。实施的内核保留了矢量和轴向矢量沃德 - 塔卡哈西的身份，同时还提供了额外的自由。因此，在相应的相互作用顶点中生成了新的张量结构，从而改变了出现在夸克 - photon和夸克张量顶点的质极的位置，并在最终结果中臭名昭著。尽管CI很简单，但计算出的形式和半径与最近的晶格QCD模拟兼容。
The pion scalar, vector and tensor form factors are calculated within a symmetry-preserving contact interaction model (CI) of quantum chromodynamics (QCD), encompassed within a Dyson-Schwinger and Bethe-Salpeter equations approach. In addition to the traditional rainbow-ladder truncation, a modified interaction kernel for the Bethe-Salpeter equation is adopted. The implemented kernel preserves the vector and axial-vector Ward-Takahashi identities, while also providing additional freedom. Consequently, new tensor structures are generated in the corresponding interaction vertices, shifting the location of the mass poles appearing in the quark-photon and quark tensor vertex and yielding a notorious improvement in the final results. Despite the simplicity of the CI, the computed form factors and radii are compatible with recent lattice QCD simulations.
